Brake-shoe.



C. W. ARMBRUST.

Patented Mar.'5, 1912.

2 SHEETS-SHEET 2.

` To all whom 'it may concern l so as well.

` my invention.

UNITED sTATEs PATENT oEEIoE.

CHARLES W. 'ARMBRUS GF CRYSTAL LAKE, ILLINOIS, ASSIG-NOR 0F ONE-FOURTHTO SYDNEY STEIN, 0F CHICAGO, ILLINOIS.

BRAKE-SHOE.

Specification of Letters Patent. 4

Patented Mar. 5, 1912.

Application led March 25, 1911. Serial No. 616,801.

Be it known that I, CHARLES W. Amu- BRUsT, a citizen of the UnitedStates, residingat Crystal Lake. in the county of Mc- 5 Henry and State`of'Illinois, have invented certain new and useful yImprovements inBrake-Shoes, of which the following 1s a specification.

This invention rela-tes to brake shoes of l0 the general type or classknown as interlocking shoes wherein the back and face of the shoes areprovided with interlocking means so that a partially worn shoe can bedetached from the brake head and applied to the Wearing face of a newshoe, thus pletely used up.

Various modifications of interlocking shoes have been devised prior tomy present invent-ion, but`so` far as I am aware. the interlockingfeature has been confined entirely to plain shoes and has not beenapplied to what-'are commonly known as flange shoes or driver shoes. Itis' well known to shoes, that is, the shoes which are used on thelocomotive to engage with the driver Wheels, are usually and preferablyofthe times lemployed in connection with the cars,

The invention will perhaps be best underlstood from the'followingdescription when /taken in connection with the accompanying drawingsillustrating one preferred form of 45 my invention and throughout thevarious viewsgof which ylikel reference characters refer to similarpart-s.

Referring to the drawings-Figure 1 is a side elevation of a brake vshoeIembodying Fig. 2 is a view showing the back of the' shoe. I Fig. 3 is aView show-4 ing the face of the shoe. Fig. 4 is a transenabling thepartially worn shoe to be come' those familiar with the art that thedriver` flange type, althoughiiange shoes are 'some-I versesectionalview on the line 4-4 of Figs.

1 and 2. Figf is' a'transverse sectional view on the line 5-'-5 ofFig. 1. Fig. 6 1s a side elevation of a modified form of my invention.Fig. 7 is a back view thereof..

Fig. 8 isv a face view thereof; and Fig. 9 is an elevation looking atthe fiange side of still another modified form of my invention.

Referring to the drawings it will beV apparent that the brake shoeproper comprises a bodyv portion 6, the face of which is adapted to bearagainst the tread of the wheel to which it is applied and a flangeport-ion 7 located at one side of the body portion ,and integraltherewith and arranged to be positioned over the flange of the wheel.

A groove 8 extending long tudinally of the fian'gelportion is provide toreceive the wheel flange. A loclting stud 9 is formed centrally of thebody portion of the shoe and upon the back thereof and the walls of thisstud are undercut so that a detachable fastening lug 10 may beengagedtherewith, as shown in Figs. 1 and 4. The fastening lug is attached tothe locking stud prefer ably by moving the lugV longitudinally of theshoe, but it will be obvious that'it might be attached by moving ittransversely of the shoe, if preferred; in that event, however, aslightly different form of lug would be required in which the key-slotis disposed at right angles to the undercut walls of the lug. 4The bacltVof the shoe, shown in Figs.A

1 and 5, is also provided preferably near its ends with locking lugs 12which extend transversely of the shoe, the walls of these lugs beingundercut for locking engagement with similarly'shapedireesses 13 -on theface of a similar shoe.v also formed centrally of the face of the bodyportion, this recess being adapted to receive and lockingly engage withthe locking stud '9 of a similar shoe. It will be noted that the recess14 extends only partially across the face of the body portion the outerend of the recess being closed. The end wall of the recess is undercutas well as the side walls to insure a firm locking engagement betweenthe recess'and its companion locking stud.

Upon the face of the flange portion of the shoe and outside the flangegroove S Ihave A. locking recess 14 isV lis provided locking lugs spacedfrom the ends of the shoe and from each other, the ends of these lugsbeing undercut, as shown, for locking engagement with the undercut endwalls of recessesil provided on the back of the flange portion of asimilar shoe. The face of the flange portion between and at each end ofthe locking lugs is preferably l' by inserting the locking lugs 12 andthe locking stud 9 into the open ends of the locking recesses 13`a1'1d14 and then moving the shoes' transversely relatively to each otheruntil the stud reaches the closed end of the recess 14. rI`his movementwill cause the lugs 15 on the flange portion to enter the recesses 16and lock lthe flanges of the shoes together. It will be obvious fromFigs. 4 and 5 that lateral ldisplacement of end 'wall of the recess 14.

the lower shoe to the left, viewing these figures, is prevented byengagement of the side walls of the interlocked flanges as well as bythe locking stud 9 which abuts against the When the shoes are in workingppsition the wheel flange is relied upon to prevent lateral displacementof the lower shoe in the opposite direction.

In the modifications disclosed in Figs. 6,

'Z and 8, the body portion 6 is provided with the locking stud 9,aspreviously described, but instead of having merely a locking lug ateach end of the shoe I have provided locking lugs .16 disposedintermediate the locking stud 9 and theend locking lugs 17. The back ofthe flange is provided with four locking recesses 18 having undercutwalls for locking engagement with the lockingv lugs 19 disposed'on theface of a similar shoe. The recesses 20 which alternate with the lockinglugs 19 are'adapted to fit over elevationsQl alternating with thelocking recesses 18 on the back of the flange. The centrally disposedlocking recess 14 is arranged to engage with the locking stud 9.

and the transverse locking recesses 22 and 28 are adapted to coperatewith the locking lugs 16 and 17 to lock the shoes together. While I haveshown'in this modification the back of the flange as provided withelevations at the ends and the face provided with correspondingdepressions Aor recesses at the ends, it will be obvious that thisarrangement may be reversed, if desired, and it will also be obviousthat the number of therecesses and elevations arranged in alternationacross the shoe may be increased or diminished, as desired. .y

In the modification disclosed in Fig. 9 the of said flange portion beingprovided with' increases flange is provided with the same number ofelevations 24 and depressions 25, as are shown in Figs. 6, 7 and'8, butthe side walls of the elevations and depressions, instead of beingundercut to. establish an interlocking 7 relation between the flanges,are arranged parallel with each other and approximately at right anglesto the longitudinal axis of the shoefy This construction permits theelevations and depressions on the back and face 7 of similar shoes tointerfit or slide into each other so as to form a continuous flangewithout interlocking, the locking lugs and vreH cesses on the bodies ofthe shoes being depended upon entirely to retain the shoes in 3, f

stood from the foregoing without further description and it will beobvious that'vari- 84 ous minormechanical changes in the size, formationand arrangement of the various parts may be resorted to withoutdeparting from the spirit or sacrificing any of the material advantagesof the invention. 9

I claim: f

l. A brake shoe comprising a body portion and an elevated flangeportion, the back and face of said body and flange portions beingprovided Awith interlocking means s.' whereby similarly shaped shoes maybe locked together.

2. A brake shoe comprising'a body portion and a flange portion, the backof the body portion and the face of the fiange porit tion being providedwith llocking lugs and the face of the body portionv and the backof theflange portion being provided with recesses adapted to interlockinglyengage with the locking lugs on a similar shoe. l 1( 3. An interlockingbrake shoe comprising a body vportion and a flange portion, the back ofsaid body portion being provided with locking lugs spaced apart and theback locking recessesI disposed intermedia-te said locking lugs and theface of the shoe 'beingl provided with locking recesses and locking lugsadapted to interlockingly engagev with the lugs and recesses on Atheback of a simi- 1] lar shoe.

4. An interlocking brake shoe comprising y a body portion and a flangeportion, locking lugs formed on the face of said flange portion andrecesses formed on the back thereof 12 and adapted to interlockingly.engage with the locking lugs on a similar shoe.

'5. An interlocking brakel shoe comprising a body portion and a flangeportion, the. back and face of said flange portion being provided withmeans for locking the flanges of similar shoes together and the back andface of the body portion being provided with means for locking the bodyportionscf similar shoes together.

` 65 provided on its 6; An interlocking brake shoe comprising a bodyportion and a flange portion, said body portion being provided .witha'centrally disposed locking stud and a plurality of locking lugs andthe flange portion being provided with a plurality; of locking lugs, thefaces of the body and flange portions opposite the locking lugs Abeingprovided withV locking recesses adapted to interlockingly V10 engagewith the lugs of a similar shoe.

7. An interlocking brake shoe comprising a body portion and a flangeportion, the back of the body portion being provided 4with a centrallydisposed locking stud adapted to be detachably engaged by a removableattaching lug, the back of the flange portion being provided withundercut locking recesses; the face of the body portion having a lockingrecess closed at one end, lthe walls of the recess being adapted toengage with a locking stud on a similar shoe and the face of' the flangehaving locking lugs adapted to engage in the locking recesses on theflange of a similar shoe whereby the shoes are locked together.

8. A brake shoe comprising a body portion and a flange portion, saidflange portion being grooved longitudinally on its face and having aplurality of locking lugs disposed outside said groove and' the face ofthe body portion being provided with transversely extending locking.recesses adapted to interlockingly engage Withlocking lugs on the backof' a similar shoe.

9. An interlockin(y brake shoe comprising a body portion and a flangeportion, said flange portion being provided near its outer edge withlocking lugs and having a wheel flange receiving groove extending longi-40-tudinally of theshoe between said lugs and said-body portion, theback of the flange being provided with locking recesses adapted tointerlockingly engage with said lugs on a similar shoe and the bodyportion being provided on its back -and face with locking means wherebythe body portions of similar.sh'oes may be locked together.

10. A brake shoe comprising a body por'- tion and an elevated flangeportion, said flange portion being equipped with provisions forinterlocking engagement with the-flange portion of a similar shoe.

11.A An interlocking brake shoe. comprising a body portion and a flangeportion,

'f5 sa1d flangev portion being provided with alternating elevations andde Jressions adapted to interfit 'vations and depressions on the flangeof a similar shoe.

.60 12. An interlocking brake shoe compris- .ing a body portion and aflange portion, said body portion being provided on its back withlockinglu s and on its face with locking recesses an said flange portion,being back: and face with alterof the body'portion, with correspon ingelenately arranged elevations'and depressions adapted to engage with theelevations and depressions on a similar shoe.

13. An interlocking brake shoe comprising a body portion and a flangeportion,said body and flange portions being provided with lugs andrecesses adapted to coperate with the lugs and recesses on the body andflange portions of a similar shoe to lock said shoes together. i 75 14.A brake shoe comprising a body portion and a flange portion having itsback elevated above the back of the body portion, said shoe beingprovided with means whereby similarly shaped shoes may be lockedtogether upon relative transverse movement thereof.

15. A brake shoe comprising a body portion, a flange portion having itsback elevated above the back of said body ortion,8'5 said body portionbeing provided with means whereby the bodies of similarly shaped shoesmay be locked together upon -relative transverse movement thereof.

16. A brake shoe comprising a'. body por- 90 tionand a flange portion,the back of said flange portion being elevated above the back of saidbody portion and said flange portion being provided with means wherebythe flanges of similarly shaped shoes may be locked together.

17. A brake shoe comprising a body por- ,tion and a flange portion, theback of said flange portion being elevated above the back and said bodyand ofv said body portion, flange portions being provided with' meanswhereby similarly shaped shoes may be locked together.

18. A brake shoe comprising a body -portion and a flange portion, theface of said flange portion being depressed relatively to the face ofsaid bod portion, and means whereby similarly s aped shoes may be lockedtogether upon relative transverse movement thereof.

'19. A brake shoe comprising a body portion and a flange portion, theface of said flan e portion being depressed relatively to the ace of thebody portion, said body portion and flange portion having provisionswhereby similarly shaped shoes may be locked' together.

Q0. A brake shoe comprising abody portion and a flange portion, the backof said flange portion being elevated above the back said' shoe havingpro-- visions for interlocking engagement with a similarly shaped shoeupon relatively transverse movement of said shoes.

21. A brake shoe comprising a body portion and a flange portion, `theface of said' flange portion being depressed relatively to the face ofsaid body portion, said shoe being equipped with means whereb asimilarly shaped shoe may be locke thereto 13 0 upon ransverse movementof one of seid' gaged therewith upon movement of one of shoes relativelyto the othe. v the shoes transversely relatively to the other,

22. A brake shoe comprisnfr a bodyportion and e ange portionv elevarted'elatvely CHARLES W' RMBRUST' 33 ao said 4body portion, said body andHange- Witnesses:

poton's having provisions whereby a simi- IRA J. WILSON, awly shapedshoe may be interlockngly en- M. ROBERTSON.

@aviles of'ths ,gm-.tent may be obtained for y.five cents each, byaddressing the F *simmer of Patents,

Washington, D'. C.

